Means for simultaneously controlling the throttle and electric motors of locomotives



May 26, 1931. c. c. c. BURKHARDT 7, 7

THROTTLE AND ELECTRIC MOTORS OF LOCOMOTIVES MEANS FOR SIMULTANEOUSLY CONTROLLING THE Filed July 7, 1928 2 Sheets-Sheet l rams/$21:

May 26, 193 c. c. c. BURKHARDT 7, 7 MEANS FOR SIMULTANEOUSLY CONTROLLING THE THROTTLE AND ELECTRIC MOTORS OF LOCOMOTIVES Filed y '7, 1928 2 Sheets-Sheet 2 p /2 Z5 l 1 l9 Patented May 26, 1931 UNITED STATES PATENT OFFICE CONRAD C. C. BURKHARDT, 0F PHILADELPHIA, PENNSYLVANIA MEANS FOR SIMULTANEOUSLY CONTROLLING THE THROTTLE AND ELECTRIC MOTO RS OF LOCOMOTIVES Application filed July 7, 1928.

My invention relates to certain improvements in what are known as oil-electric locomotives, in which an internal combustion engine drives a generator which in turn supplies current to the motors on the trucks of the engine.

The object of my invention is to control the throttle of the internal combustion engine simultaneously with the electric control of the motors. This object I attain by the use of a column of liquid which transmits the movement at the controller to a point near the throttle of the internal combustion engine.

In the accompanying drawings:

Fig. 1 is a diagrammatic side view of a locomotive illustrating my invention;

Fig. 2 is a plan view of the same;

Fig. 3 is a detail view showing the electric controller at one end of the locomotive, a hydraulic cylinder, and a piston, a tube leading from the cylinder, the piston being connected to the controller, and the tube leading from the hydraulic cylinder;

Fig. 4 is aplan view of the controller shown in Fig. 3;

Fig. 5 is a side view showing the engine throttle and the cylinder and tubes connected to the tube leading from each end of the locomotive; and

Fig. 6 is a plan view of the construction shown in Fig. 5.

Referring to the drawings, 1 is the cab of a locomotive. 2 is an internal combustion engine. 3 is an electric generator driven from the engine. 4 is an electric controller at one end of the cab, and 5 is an electric controller at the opposite end of the cab. These two controllers are identical in form and are shown in enlarged views in Figs. 3 and 4. These controllers may be of any standard type, and wires lead from these controllers to the motors (which are not shown).

6 is the throttle of the engine. 7 is the cam-shaft and 8 is a cam thereon. 9 is a sprocket-wheel over which passes a driving chain 10, which in turn is controlled by the long arm of a bell-crank lever 11, the short arm of this lever being connected to a piston 12 within a hydraulic cylinder 13 of any Serial No. 291,083.

suitable type. A pipe 14 leads to this cylini rod 21 of a piston 22, all of which are located I in either one of the cylinders (17 or 18), and, as stated above, the end of the cylinder is coupled to the pipes leading to the cylinder 13 at the throttle of the engine.

The long arm of the lever 11 is connected to a shifting rod 25 attached to the sprocketchain 10 which passes around a lower sprocket-wheel 26 and the sprocket-wheel 9 on the cam shaft 7. The cam 8 on this shaft 7 acts on the engine throttle.

The cam 8 is so designed that at idling speed of the oil engine and no voltage to the motors, the low portion of the cam is in contact with the throttle at idling. The cam has a uniform rise to the maximum in 180 degrees of a revolution. The cam shaft in the present instance has a sprocket mounted upon the end opposite the cam, made to engage a roller chain and of such diameter that onehalf of a. revolution of the sprocket, and consequently of the cam, is equal to a lineal distance greater than that which the pistons move in their respective cylinders, and for this reason a bell-crank of unequal arms is used.

In some instances the cylinders at the controllers may be of a different diameter than that at the throttle of the engine, without the locomotive, and this movement is transmitted through the liquid to the cylinder 13 at the throttle of the engine.

While I have illustrated my invention in connection with a single internal combustion engine ofthe Diesel type, it Will be understood that the invention can be applied to other internal combustion engines as well, and Where two or more engines are used, then the engines and their mechanisms can be so arranged that theengines will besimultaneously throttled.

I claim 1. The combination in an oil-electric locomotive, of an oil engine; an electric generator driven by said engine; a traction motor; means for supplying current to said motor; a vertical controller at one end of the locomotive for said motor; throttle valve mechanism for the oil engine; a lever for actuating the said throttle valve mechanism; a cylinder; a piston within the cylinder connected to the lever; an arm on the vertical controller; a cylinder at the controller; a piston within the last-mentioned cylinder connected to said arm; and a pipe extending from one cylinder to the other cylinder, so that the throttle will be controlled simultaneously with the electric control of the motor.

2. The combinationin an oil-electric locomotive, of an oil engine; an electric generator driven by said engine; a traction motor; means for supplying current to said motor; a controller at one end of the locomotive; throttle valve mechanism for the oil engine; a cam for operating the throttle valve mecnanism; a shaft on which the cam is mounted; a sprocket-wheel on the shaft; an endless chain passing around the sprocket-wheel; a lever the long arm of said lever engaging the chain; a fixed cylinder at the controller; a piston therein; an arm on the controller shaft to which the piston is connected; and a pipe leading from the cylinder at the controller to the cylinder at the throttle valve mechanism of the oil engine.

CONRAD G. C. BURKHARDT. 

